Materials Literature
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Two novel silicon-centered benzimidazole derivatives, Bis(4-(benzimidazol-1-yl)phenyl) dimethylsilane (1) and Bis(3-(benzimidazol-1-yl)phenyl)dimethylsilane (2) have been synthesized and determined by IR, 1H NMR, 13C NMR and mass spectroscopy. These compounds have high thermal stability and are fluorescent with emissi…
Polyimide polymer membranes posses' exceptional physical - chemical properties including excellent stability at relatively high temperatures (~ 400°C), superior mechanical properties, and are highly resistant to various chemicals. Palladium is well known for its unique physical - chemical interactions with hydrogen. I…
Vertically-aligned ZnO nanowires on a sapphire substrate have been synthesized by a nanoparticle-assisted pulsed-laser deposition using a Sb2O3doped ZnO target. Uniform cone-shape core was formed at the bottom of each vertically-aligned ZnO nanowire. The nanowires consist of single-crystalline wurzite ZnO crystal with…
In order to prepare efficient luminescence material, two kinds of novel magnesium luminescence materials were synthesized by the reaction of magnesium chloride with 2-acetyl-1-naphthol-diethylenetriamine (1) and 2-acetyl-1-naphthol-triethylenetetramine (2), respectively. The luminescent properties of two novel magnesi…
Findings of comparative bench tests for six grades of carbon and alloyed structural steels hardened by surface electrolysis borating and data of the reliability for borated members under field conditions within a heterogeneous abrasive environment and for borated scoop pins in hinged joints of a scoop chain of a sucti…
Plane strain fracture toughness is an important mechanical performance index for damage tolerance design, so how to obtain this value through test deserves consideration. In this paper, the ductile fracture toughness test was performed. It was difficult for the specimen with big dimensions in the case of plane strain…
this paper did a profound research on the stochastic material of Electro-optic (EO) polymers and mathematic model, and analyzed the stationary stochastic processes, derived the stochastic process mean and autocorrelation function. Setup a bidirectional diode circuit model as a stochastic system to perform the analysis…
The results of investigations of solar grade mc-Si by means of combination of scanning X-ray beam excited optical luminescence microscopy (SXEOL), X-ray beam induced current (XBIC) and X-ray fluorescence (XRF) are presented. It was found, that for relatively clean sample SXEOL and XBIC provide similar information abou…
The brushless dc motor has a permanent-magnet rotor, and the stator windings are wound such that the back electro motive force(EMF) is trapezoidal. The paper develops a phase variable model of the BDCM and uses it to examine the performance of a BDCM speed servo drive system when fed by hysteresis and pulse width modu…
With the electronic packaging technologies entering the 3D era, researches are needed to associate the microstructures with reliability and accurately predict the performance of solder joints/interconnects. It has been demonstrated that both the size and geometry have an impact on the microstructural formations within…
Rigid-viscoplastic finite element method was used to analysis the cold extrusion of the external boss and ring gear. Some groups of numerical models were built with different design parameters of die, geometric parameters of gear, processing conditions, and the service loads were investigated. Form the investigation;…
This paper presents In situ quick repairing of defects inside a telescoping multi-walled carbon nanotubes (MWCNTs) using contact resistance. The defects were inserted and repaired by In situ nanomanipulation technique inside a transmission electron microscope (TEM). The defects were quickly (less than ∼0.1 s) repaired…
The effects of the concentration of monomer, crosslinking agent, initiator, stabilizer, and the polarity of medium on the polymerization kinetics were investigated. The results show that the rate of polymerization (R p) and conversion increased with the increase of monomer concentration from 8% to 15% (total mass); th…
In the present paper, the electret behavior of NCO- terminated liquid crystalline polyurethane using thermally stimulated depolarization current (TSDC) technique is reported.
Unlike the saturated aliphatic and aromatic alcohols, allyl alcohol under the same conditions reacts with polyfluoroalkyl chlorosulfites to form not ethers, but polyfluorinated alcohols. The exception is polyfluoroalkyl chlorosulfites with the chain length of more than five carbon atoms. Allyl ethers of polyfluorinate…
In response to the serious barium / strontium – scale in oilfields, we simulated oilfield conditions and investigated the scale inhibition performance of several common scale inhibitors to barium and strontium, by following the protocol from Evaluation Methods of Anti-Scale Agent for Oilfield Use, Petroleum Gas Standa…
Stress migration behaviors in Tungsten (W) films were investigated according to morphological characteristics and residual stress analysis. Results show that stress relaxtion induced formation of voids and hillocks strips, which resembles the void / hillock pair observed in Cu film electromigration experiments. Analys…
Sb-Al co-doped ZnO nanowires have been successfully synthesized using nanoparticles-assisted pulsed-laser deposition. These nanowires possess wurzite crystal structures with a sharp UV emission, highly suitable for optoelectronics applications.
This paper developed a new type of ball-type porous metal preparation method. A brief introduction of this new type of spherical aluminum-based metal forming method of porous, pore structure and its compression and energy absorption properties, but also involves the performance of spherical holes iron foam.
The broad visible photoluminescence (PL) observed in ZnO nanocrystals (NCs) is widely attributed to multiple low lying surface-defects. We have performed steady state and time-resolved PL measurements on size-selected ZnO NCs in the strong confinement regimes. Our results show that radiative relaxation rates and coupl…